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Nanometer level regenerated spider silk fiber and its preparation method

A spider silk fiber and nano-scale technology, applied in the fiber field, can solve problems such as the inability to use spider egg-coated silk and unstable product color, and achieve the effects of stable structure and color, improved mechanical properties, and improved external force bearing capacity

Inactive Publication Date: 2007-11-28
SUZHOU LONGJIE SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing regenerated spider silk fibers, which can be applied to the regenerated processing of spider ovum silk and traction silk at the same time, so that the structure and color of the obtained product are stable, and the existing method cannot use spider ovum silk For the problem of unstable color of raw materials and products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Making Regenerated Spider Silk Fibers with Spider Egg Silk

[0023] After the spider lays eggs, carefully separate the fibers from the egg cocoons and wrap the eggs with other fiber materials so that they can hatch normally; carefully remove the impurities on the separated egg-coated silk fiber bundles and save them for later use .

[0024] After cutting the above-obtained ovum filaments into appropriate lengths (several centimeters), dissolve them in 99% hexafluoroisopropanol (HFIP) at room temperature, place them overnight and filter to obtain a spinning solution with a concentration of 1.2 wt%. The voltage is 9Kv, the distance from the spinneret to the receiving screen (conductive metal mesh) is 10cm, and the temperature is 25°C. Electrospinning is carried out to obtain a regenerated spider silk fiber with a diameter distribution of 54-164nm and an average diameter of 94nm. About 60% of the fiber diameters are below 100nm. The crystallinity is 39%, which...

Embodiment 2

[0027] The ovum-coated silk is dissolved in 99% HFIP at room temperature, placed overnight and then filtered to obtain a spinning solution with a concentration of 3wt%. At a voltage of 15Kv, the distance from the spinneret to the receiving screen (conductive metal mesh) is 14cm. Electrospinning was carried out at a temperature of 25°C to obtain regenerated spider silk fibers with a diameter distribution of 67-189nm and an average diameter of 142nm, of which about 65% of the fibers had a diameter below 150nm. The degree of crystallinity is 37%.

[0028] The 1mm wide, 0.1mm thick, and 10mm long nonwoven fabric made of the regenerated spider silk can bear an average external force of 26cN and an elongation of 21%. After being treated with acetone for 1 hour, the average external force that a sample of the same size can bear is 32cN.

Embodiment 3

[0029] Example 3: Making Regenerated Spider Silk Fibers with Spider Traction Silk

[0030] Let the spider fall from a high place or crawl on the table, and after the silk end is exposed from the silk outlet of the large cystic gland, use a self-made spider silk winding machine to wind down at a speed of 20-100mm / s to obtain to the pulling wire.

[0031] Dissolve the drawn filament in 99% HFIP at room temperature, place it for 5h and filter to obtain a spinning solution with a concentration of 1.8wt%. At a voltage of 9Kv, the distance from the spinneret to the receiving screen (conductive metal mesh) is 10cm. Electrospinning was carried out at a temperature of 25°C to obtain regenerated spider silk fibers with a diameter distribution of 86-259nm and an average diameter of 175nm, and about 72% of the fibers had diameters below 200nm. The degree of crystallinity was 27%.

[0032] The 1mm wide, 0.1mm thick, and 10mm long nonwoven fabric made of the regenerated spider silk can be...

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Abstract

The invention discloses a manufacturing method for nm grade regeneration spider silk fiber. It includes the following steps: dissolving the egg covering silk or dragging silk in hex-fluorin isopropyl alcohol, and putting under room temperature for 5 hours, the regeneration spider silk solution would be available after filtrating and the consistence is 1.0%-4.5%; processing the solution by the method of static electrical filature and using the conduct metal net as receive screen, the voltage is from 7-29KV, the distance from the silk spraying outlet to the receiving screen is 8-20cm, and temperature is 20-30 degree centigrade, the nm grade regeneration spider silk nonwoven fabric would be available after spinning; taking after process to the nonwoven fabric by wood alcohol or acetone for 0.5-1.5 hour, the nm grade regeneration spider silk fiber would be available. The invention could improve stability and the mechanical property of the products structure and color.

Description

technical field [0001] The invention relates to a method for preparing regenerated fibers using animal raw materials, in particular to a method for preparing nanoscale regenerated fibers using spider ovum-coated silk or traction silk as raw materials, and the fibers obtained by this method. Background technique [0002] Because of its excellent mechanical properties, spider silk has become one of the research hotspots at home and abroad. At present, the research object is mainly the traction silk secreted by the macrocystic gland when the spider escapes. The application of spider silk as a protein fiber in the field of biomaterials is very impressive, but the problem that plagues researchers is that the amount is too small, and it is difficult to carry out conventional textile processing. [0003] Because it is difficult for spiders to be raised like silkworms to obtain a large amount of traction silk fibers, in recent years, research on artificiall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01F4/02D01D1/02D01D5/06
Inventor 潘志娟许箐
Owner SUZHOU LONGJIE SPECIAL FIBER
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